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Adsorption characteristics of [Fe(III)–EDTA] − on granular activated carbon from aqueous solutions
Author(s) -
Yang XiaoJuan,
Long XiangLi,
Yuan WeiKang
Publication year - 2013
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.11646
Subject(s) - adsorption , activated carbon , aqueous solution , chemistry , freundlich equation , langmuir , inorganic chemistry , carbon fibers , langmuir adsorption model , nuclear chemistry , materials science , organic chemistry , composite number , composite material
In this study, the adsorption of [Fe(III)–EDTA] − on coconut‐activated carbon from aqueous solutions has been studied in a batch stirred cell. Experiments have been carried out to investigate the effects of temperature, [Fe(III)–EDTA] − concentration, pH, and activated carbon mass on [Fe(III)–EDTA] − adsorption. The experimental results manifest that high temperature is favorable to the adsorption of [Fe(III)–EDTA] − on the activated carbon. The [Fe(III)–EDTA] − adsorption on activated carbon increases with its concentration in the aqueous solutions. However, the [Fe(III)–EDTA] − adsorption on activated carbon decreases as the pH rises. The [Fe(III)–EDTA] − adsorption on per gram of activated carbon decreases as the activated carbon mass increases. The kinetic study shows that [Fe(III)–EDTA] − adsorption on the activated carbon is in good compliance with the pseudo‐second‐order kinetic model. The Langmuir and Freundlich equilibrium isotherm models are found to provide a good fitting of the adsorption data. Thermodynamic parameters such as E a , Δ G 0 , Δ H 0 , and Δ S 0 for adsorption reaction are estimated. © 2012 American Institute of Chemical Engineers Environ Prog, 32: 470–479, 2013